Brandon Gap (west side)
8398.3 m · net rise 462.3 m · total ascent 488.2 m · overall 5.5% · confidence: good · Vermont · share
Shape: sustained — 41% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 403 m.
Not yet matched against documented climbs — the measurement stands on its own.
≈ Overhead cover (tree canopy or structures) spans 8% of this route — detected by comparing the surface model (DSM, treetops and rooftops) against the terrain model (DTM, bare ground). Under cover the bare-ground model is built from fewer laser returns, so metre-scale readings can wobble; maxima whose window sits in a covered zone are marked ≈ below — less certain — the flag does not say whether the true value is higher or lower. Longer windows average over more clean ground and are steadier.
Gradient ladder what do windows mean?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | ≈14% | 7703–7705 m | under overhead cover terrain reads 87.1% at 2687–2689 m across a structure — excluded |
| 3 m (diagnostic) | ≈14% | 7813–7816 m | under overhead cover terrain reads 84.5% at 2686–2689 m across a structure — excluded |
| 5 m | ≈13% | 7812–7817 m | under overhead cover terrain reads 77.5% at 2686–2691 m across a structure — excluded |
| 10 m | ≈13% | 7807–7817 m | under overhead cover terrain reads 55.8% at 2682–2692 m across a structure — excluded |
| 20 m | ≈12.9% | 7798–7818 m | under overhead cover terrain reads 30.7% at 2682–2702 m across a structure — excluded |
| 25 m | ≈12.9% | 6549–6574 m | under overhead cover terrain reads 25.6% at 2682–2707 m across a structure — excluded |
| 50 m | ≈12.8% | 6543–6593 m | under overhead cover terrain reads 15.3% at 2682–2732 m across a structure — excluded |
| 100 m | ≈12.7% | 6543–6643 m | under overhead cover |
descends_at_end Extent detection suggests reviewing where this climb starts/ends.
Map
Check this route yourself: Google Maps route via their router · Street View at the base where coverage exists · OSM way 19719409 highlights the mapped road · geojson.io our exact measured line · OpenTopoMap
This climb's data: OCL JSON — the full gradient ladder, quality flags and provenance in the OpenClimb Ladder format.
Measured, not vetted. This page records what the laser record shows about the road's shape — nothing more. Nobody has necessarily ridden or inspected this road for the survey, and a page here is not a recommendation and no guarantee that the road is open, surfaced, rideable or safe. Gates, private sections, missing rights of way and hazards do not show up in elevation data. Check access and conditions on the ground and make your own judgment.
Ridden it, or know better? Submit data for this climb no account needed · Share this climb
© OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap
Profile
Provenance
{
"analysis_version": "0.1.0",
"sample_interval_m": 1.0,
"interpolation": "bilinear",
"smoothing": "none",
"gradient_windows_m": [
5.0,
10.0,
20.0,
25.0,
50.0,
100.0
],
"diagnostic_windows_m": [
2.0,
3.0
],
"elevation_crs": "EPSG:26918",
"elevation_resolution_m": 1.0,
"elevation_tiles": [
"data/cache/usa/vt/USGS_1M_18_x65y486_VT_Statewide_A23.tif",
"data/cache/usa/vt/USGS_1M_18_x66y486_VT_Statewide_A23.tif"
],
"calculated_at": "2026-08-22T09:47:38+00:00",
"road_source": "OpenStreetMap (local PBF extract)",
"road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
"osm_ids": [
19719409,
1019186870,
19677054,
1314047809,
1314047808
],
"osm_versions": {
"19719409": 7,
"1019186870": 1,
"19677054": 8,
"1314047809": 1,
"1314047808": 1
},
"osm_timestamps": {
"19719409": "2022-01-07 18:00:58+00:00",
"1019186870": "2022-01-07 18:00:58+00:00",
"19677054": "2024-09-07 21:01:58+00:00",
"1314047809": "2024-09-07 21:01:58+00:00",
"1314047808": "2024-09-07 21:01:58+00:00"
},
"osm_retrieved_at": "2026-08-22T09:47:38+00:00",
"osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
"osm_snapshot": "2026-08-21T20:21:11Z",
"elevation_provider": "USGS 3DEP (The National Map)",
"elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
"elevation_dataset": "USGS 3DEP 1 m DEM, VT_Statewide_A23 (collected 2023)",
"elevation_tile_ids": [
"x65y486",
"x66y486"
],
"route_base_cut_m": 3506,
"climb_origin": "named",
"notes": "VT-73 from Forest Dale/Brandon. Extent completed 2026-08-22: absorbs the final crest ramp (ways 1314047808/09) that was previously mislabeled as the 'east side' entry; end 97 m from GNIS 'Brandon Gap' pre-trim (VTrans paved). base_cut_m 3506 applied 2026-08-22 (ranked entries start where the climbing starts; forward-500 m >= 3% probe).",
"canopy_source": {
"kind": "ept_corridor_max_return",
"ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/VT_Statewide_2_A23",
"ept_crs": "EPSG:3857",
"station_coverage": 1.0,
"cell_ground_m": 1.0,
"nodes_failed": 0
},
"license": "ODbL-1.0",
"license_url": "https://howsteep.org/licensing.html"
}